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1.发明授权
公开(公告)号：US3257612A
公开(公告)日：1966-06-21
申请号：US19882662
申请日：1962-05-31
Applicant: BRISTOL COMPANY
Inventor： STERLING GORRILL WILLIAM , THURN JOHN A
CPC classification number: G01P3/60 , G01P3/4802
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